RT Journal Article T1 Pruebas morfológicas y estructurales sobre el origen de las fracturas de descamación T2 Morphological and structural evidences concerning the origin of sheet fractures A1 Vidal Romaní, Juan Ramón A1 Twidale, C.R. A1 Campbell, E.M. A1 Centeno Carrillo, Juan de Dios AB Sheet fractures are well and widely developed in massive rocks, i.e., rocks lacking other partings, and they have been discussed in the literature for more than a century. Yet there is no agreement as to their origino Two contrastedinterpretations hold sway. Almost without exception, geologist adhere to the pressure release or erosional offloading hypothesis. Engineers and engineering geologist, on the other hand, interpret sheet partings as buckling, i.e., crumpling or bending out of plane, related to compressive stresses, particularly lateral stresses.After a review of nomenclature and a description of the characteristics of sheet fractures, a critique of previous explanations of their origin is presented. What are perceived to be critical lines of structural and morphological evidence, bearing on the origin of sheet fracture are next reviewed, and this is followed bya discusion of the possible origins of the structures. PB Seminario de Estudos Galegos. Area de Xeoloxía e Minería ; Instituto Universitario de Xeoloxía "Isidro Parga Pondal" SN 0213-4497 YR 1995 FD 1995 LK https://hdl.handle.net/20.500.14352/59869 UL https://hdl.handle.net/20.500.14352/59869 LA spa DS Docta Complutense RD 7 abr 2025